audiochargingheadphonessound-volume
I have a Macbook Air and whenever I plug in the USB-C cable to charge, it makes a notification chirp to indicate it's charging.
The problem is that this sound comes out audibly, even when headphones are plugged in (unlike other sounds which do come through the headphones), and even when all sounds are muted (other sounds do get successfully muted).
The charging chirp does not seem to follow regular rules governing notification sound effects. How can I plug my laptop in to charge silently?
If you have a Macbook Pro with only one jack input (no separate inputs for microphone/headphones), try alt (option) clicking the Sound Menu in the menu bar and selecting "Use Audio port for" -> Input. This way the system will think that you want to use what's plugged in as microphone and not as headphones and you will be able to use the speakers once again.
Not possible, you would have to physically alter the USB cord and remove the pins related to power and leave the data ones intact.
Best Answer
Edit: you may find answers here Turning Power Chime Off
Open Terminal, and run the following command:
defaults write com.apple.PowerChime ChimeOnNoHardware -bool true;killall PowerChimeIf that didn't work, try:
defaults write com.apple.PowerChime ChimeOnAllHardware -bool false;killall PowerChimeTo re-enable it:
defaults write com.apple.PowerChime ChimeOnAllHardware -bool true; open /System/Library/CoreServices/PowerChime.app &